<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 听过for循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <!-- 删除按钮 -->
            <el-button size="mini" type="danger" icon="el-icon-delete"  @click="removeRolesById(scope.row.id)">删除</el-button>
            <!-- 分配角色按钮 -->
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 添加角色的对话框 -->
      <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
        <!-- 内容主体区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>

          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRoles">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 修改角色的对话框 -->
      <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="30%" @close="editDialogClosed">
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRolesInfo">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  name: 'MyRoles',
  data () {
    // 验证角色名称的规则
    const checkName = (rule, value, cb) => {
      // 名字的正则
      const regName = /^[\u4E00-\u9FA5\uf900-\ufa2d·s]{2,20}$/

      if (regName.test(value)) {
        // 合法名字
        return cb()
      }

      cb(new Error('请输入合法的名字'))
    }

    // 验证角色描述的规则
    const checkdescribe = (rule, value, cb) => {
      // 验证角色描述的正则表达式
      const regdescribe = /^[\u4E00-\u9FA5\uf900-\ufa2d·s]{2,20}$/

      if (regdescribe.test(value)) {
        return cb()
      }
      cb(new Error('请输入合法的角色描述'))
    }
    return {
      // 所有角色列表数据
      rolelist: [],
      // 所有权限的数据
      rightslist: [],
      // 控制分配权限对话框的现实与隐藏
      setRightDialogVisible: false,
      // 控制对话框的显示与隐藏
      addDialogVisible: false,
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的id值数组
      defKeys: [],
      // 当前即将分配权限的id
      roleId: '',
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '角色名长度在2~10个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 2, max: 20, message: '密码长度在2~20个字符之间', trigger: 'blur' }
        ]
      },
      // 修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { validator: checkName, trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { validator: checkdescribe, trigger: 'blur' }
        ]
      },
      // 控制修改角色对话框的现实与隐藏
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {}
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色失败')
      this.rolelist = res.data
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮,添加角色
    addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加角色的网路请求
        const { data: res } = await this.$http.post('roles', this.addForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败!')
        }

        this.$message.success('添加角色成功!')
        // 隐藏添加角色的对话框
        this.addDialogVisible = false
        // 重新获取角色的列表
        this.getRolesList()
      })
    },
    // 展示编辑角色的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查新角色信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRolesInfo () {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        // 发起put请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功')
      })
    },
    // 根据元素删除对应的值
    async removeRolesById (id) {
      // 弹框询问角色是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
        // 如果取消删除,则返回字符串cancel
      }).catch((err) => err)
      // 如果角色确认删除,则返回一个文本confirm
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRolesList()
    },
    // 根据ID删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件，是否继续？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') return this.$message.info('取消删除！')

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

      if (res.meta.status !== 200) return this.$message.error('删除权限失败！')

      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')

      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data

      // 递归回去三级权限节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys 数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功')
      // 更新列表
      this.getRolesList()
      // 关闭弹出框
      this.setRightDialogVisible = false
    }

  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin:7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}

.vcenter{
  display: flex;
  align-items: center;
}
</style>
